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FLIGHT First Stage Regulator Maintenance ManualFLIGHT First Stage Regulator Maintenance Manual
Table 1 - Troubleshooting Guide
SYMPTOM POSSIBLE CAUSE TREATMENT
High Pressure Creep
(also causes second stage leaks)
1. HP Valve (16) is worn or damaged.
1. Replace HP Valve.
2. ‘O’ ring inside HP Balance Chamber
(18) is damaged or worn.
5. Replace ‘O’ ring.
3. H.P balance chamber damaged 6. Replace balance chamber
4. HP Valve Seat in Valve Body (9) is worn
or damaged.
7. Replace Valve Body.
External air leakage
1. Blanking Plug ‘O’ rings (12,14) are
worn or damaged.
1. Replace ‘O’ Ring.
2. Diaphragm (6) worn or damaged.
2. Replace diaphragm.
3. Diaphragm seating surface
damaged.
3. Replace Valve Body (9).
4. Connector ‘O’ ring (20) worn or
damaged.
4. Replace ‘O’ Ring.
5. Diaphragm Clamp (4) loose.
5. Tighten Diaphragm Clamp to
specied torque.
6. ‘O’ rings on DIN Bolt (14,25) worn or
damaged.
6. Replace ‘O’ Rings.
Restricted air ow or high inhalation
resistance through entire system
1. Cylinder valve not completely open. 1. Open valve, check ll pressure.
2. Cylinder valve requires servicing 2. Switch to dierent cylinder.
3. DIN Filter (23) or Disc Filter (27) is
blocked.
3. Replace lter.
4. Very Low Medium Pressure.
4. Adjust Medium Pressure to
between 9 and 10 bar.
Table 2 - Recommended Tool List
PART NO. DESCRIPTION APPLICATION
AP0430 I.P. test gauge Intermediate pressure testing
AT79
‘O’ Ring removal pick ‘O’ Ring removal
AT71 Diaphragm Clamp Tool Removal of Composite Diaphragm Clamp
AT48 First Stage Work Handle Clamping Valve Body in Vice
AT24 Circlip Pliers Removal and installation of Circlip
n/a Torque wrench, Nm or lbf/ft
Installation of Composite Diaphragm Clamp, DIN
Connection and Yoke Connection
n/a 6mm Allen key bit for torque wrench Installation of DIN Bolt and Yoke Connector
AT34 11/16” spanner Hose Removal
AT37 5mm Allen key Blanking Plugs
AT38 6mm Allen key Removal of DIN Bolt
n/a 10mm Allen key Removal and Installation of Large Spring Adjuster
n/a 22mm Deep Socket Removal and installation of DIN Connector
AT74 Yoke Connector Socket Removal and installation of Yoke Connector
n/a 22mm Spanner Removal DIN Connector
n/a 232 or 300 bar Diving cylinder Testing of regulator
AP0430
AT34
AT24
AT79
Notes:
1. Photos not to scale.
2. Actual tools may dier
from photos.
AT48
AT37
AT38
AT71
6mm Allen Key Bit
AT74